Padlock



Nov. 15, 1938. c. E. HABRAM ET AL 2,136,435

' PADLOCK Filed Sept. 9, 1937 Blasts-Sheet 1 FIG.1

' INVENTORS A I Z0 g M A'TTOQNE NOV. 15, 1938. c E HABRAM ET AL2,136,435

PADLOCK Filed Sept. 9, 1957 Sheets-Sheet 2 FIG. 8

FIG. 10

INVENTORS Patented Nov. 15, 1938 PATENT OFFHCE PADLOCK Charles E.Habram, Foote, West Allis, Lock Company, of Wisconsin Milwaukee, andDaniel- J. Wis., assignors to Master Milwaukee, Wis., a corporationApplication September 9, 1937, Serial No. 162,960

11 Claims.

The invention relates to looks and more particularly to padlocks.

It. has been found possible for unauthorized persons to open a padlockof the type having-a spring-pressed locking bolt by skilful hammering,tapping, pulling and other manipulation of the padlock and its shackle,such manipulation causing the locking bolt to be jarred or vibrated outof locking position.

It is an object of the present invention to provide an improved padlockembodying simple but effective means for preventing unlocking movementof the locking bolt by hammering and other unauthorized manipulation ofthe padlock.

Another object of the invention is to provide a padlock in which themeans for resisting the unauthorized unlocking movement of the belt willnot interfere with the retraction of the bolt by the lock mechanism.

The invention further consists in the several features hereinafterdescribed and claimed.

Certain embodiments of the invention are illustrated in the accompanyingdrawings, wherein Fig. 1 is a side view of a padlock constructed inaccordance with the invention, parts being broken away and parts beingshown in section, and the shackle being shown in locked position;

Fig. 2 is a sectional view taken generally along the line i -12 of Fig.1, parts being broken away and parts being shown in section, on adifferent plane, and the shackle being open;

Fig. 3 is a detail perspective View of a locking bolt for the padlock;

Figs. 4, 5, 6, '7, and 8 are locks embodying different invention, and 7Figs. 9 and 10 are similar sectional views of padlocks embodying stillother modified forms of the invention.

In these drawings, ill designates a lock case which is apertured toreceive a shackle H of any suitable construction. By way of example, theshackle is here indicated to be of the slidable type, one: leg beingsecured in the case for longitudinal movement and also for rotation, andthe other leg having a locking notch l2. If desired, the shackle may beurged to open position by the usual spring iii engaging the long leg ofthe shackle.

In that form of the invention shown in Figs. 1 to 3, the lock case isindicated to be of the laminated type comprising a stack of metal platesit! which are riveted or otherwise rigidly secured together, the platesbeing suitably apertured to form the interior spaces or chambers of thecase.

sectional views of padmodified forms of the The shackle notch l2receives therein the beveled nose of a shiftable locking member or boltl4 mounted and loosely guided in a cavity l5 formed in the lock case,the bolt being urged to locking position by a spring I 6. The bolt I4 isretractable. by any suitable locking mechanism mounted in the case. Inthe present instance, the locking mechanism is shown to be of the typehaving a rotatably mounted lock barrel l7 operated bya key l8, thebarrel having a shouldered or cutaway semi-cylindrical inner end l9which is engageable with a lug 25 formed on the bolt to reract the bolt.The advancing travel of the bolt may be limited in various ways, as byits engagement with an end wall of the cavity I5.

In order to prevent retraction of the bolt by blows on the lock case,the bolt when in looking position has an interenga'ging connectionwithan adjacent part of the case. A shoulder-forming rib 2! is pressed orotherwise formed on the 2 substantially fiat upper end wall of the lockcase to project into the bolt-guiding cavity 15 of the case, and extendstransversely of the direction of movement of the bolt. The rib 2! isconveniently formed on one of the plates NJ before it is assembled intothe case-forming stack. The rib enters a recess 22 formed transverselyin the top wall of the bolt and is engageable with a shoulder 23defining the end of the recess adjacent the nose of the bolt. The bolthas a heel 24 on which it may pivot, if desired.

With the shackle urged outwardly, either by the spring I3 or by manualtension on the shackle, or both, the shoulder 23 of the bolt is near orin engagement with the rib 2! of the case, as seen in Fig. 1, thuspreventing unauthorized persons from jarring the bolt out of lockingposition by hammering or tapping on the case or shackle.

In operation, when it is desired to unlock the padlock, the key M isinserted into the lock barrel and is turned in either direction, thebarrel projection it moving the bolt lug 2i] and causing retraction ofthe bolt. The bolt-guiding cavity I5 in the case is sufficiently deep topermit the nose of the bolt to move under the rib 2!, the shackle beingmovable inwardly from normal locking posi tion to allow release of theblocking shoulders and retraction of the bolt. In its retraction thebolt is released from the rib by tilting movement or cam action, orboth. The shackle moves to open position under urge of the spring 13. Tolook the padlock, the notched leg of the shackle is reentered into thecase. On its entering movement, the beveled end of the shackle legforces the bolt back against the action of the spring i6 and downwardlyaway from the rib 2|, the bolt even tually snapping into the shacklenotch l2.

In the modified form of padlock shown in Fig. 4, the case is providedwith one or more driven or riveted pins or pegs 2i in place of the rib2| of the device of Fig. 1. This construction may be used in look casesof various types and is suitable for a lock case of the solid type.

In the modified form of device shown in Fig. 5, a resilient metal plateor leaf spring 25 is riveted at 26 or otherwise secured to the upperwall of the bolt-guiding cavity and carries a transversely extendingshoulder-forming bead or rib 21 which enters the bolt recess 22 andserves the same purpose as the rib 2i of Fig. 1. The resilient platepresses down on the bolt, so as to urge the rib 21 into the bolt recess22.

In the modified form of padlock shown in Fig. 6, a blocking member 28,such as a ball or roller, projects into the bolt recess 22 and also intoa shoulder-forming pocket 29 in the top wall of the bolt-guiding cavity,the pocket being pressed or otherwise formed in the case.

In the modified form of device shown in Fig. '7, a bolt I carries atransverse shoulder-forming top rib 30 which enters a shoulder-formingpocket 29 in the top wall or" the bolt-guiding cavity, the pocket beingpressed or otherwise formed in the case. This a reversal of the relationshown in Fig. 1.

In the form of padlock shown in Fig. 8, a resilient metal plate or leafspring 3! is riveted at 32 or otherwise secured to the top face of abolt it, the plate having a shoulder-forming hump or rib 33 which entersa shoulder-iorming pocket 29 in the top wall of the bolt-guiding cavity,the pocket being pressed or otherwise formed in the case. The resilientplate presses upwardly so as to urge the rib 33 into the pocket 29.

In the form of the invention illustrated in Fig. 9, one of the plates l,forming the upper wall of the cavity i5, is apertured or cut away topresent a shoulder 5! in place of the rib 2! of the device of Fig. 1,thus avoiding the necessity for pressing or upsetting the plate. Theshoulder 5i cooperates with a shoulder 53 on a spring-pressed bolt 44.

In the modified form of device shown in Fig. 10, the spring-pressed boltil i has its lug lZil provided with a shoulder I23 to engage ashoulderforming rib l2l pressed or otherwise formed on one of theinterior plates or laminations l0 defining the bottom wall of abolt-guiding cavity l5. When, the locked shackle is urged upwardly, thebolt pivotally bears at an intermediate point on the top wall of thecavity, causing the shouldered lug iii) to be pressed downward formaintaining the blocking shoulders I2i and I23 in juxtaposition. Therotatable lock barrel i9, however, is capable of releasing the blockingengagement when retracting the bolt.

The several modified forms of padlocks are otherwise the same as thepadlock of Fig. 1, and operate in the same manner.

While the invention is particularly suitable for locks of the laminatedcase type, it is also applicable to looks having cases of solid, shell,or other construction. The padlocks here shown are keyoperated and haveslidable shackles, but the invention is also adapted for use with othertypes of padlocks, such as permutation padlocks and padlocks withpivoted shackles.

What we claim as new and desire to secure by Letters Patent is:

1. In a padlock, the combination of a lock case, a shiftably mountedshackle, and a spring-pressed bolt in said case engageable with saidshackle to lock said shackle, said case and bolt having shouldersreleasably engageable with each other to resist jarring of said boltfrom looking position, and said shackle when moved inwardly from normallocking position permitting release of said shoulders and retraction ofsaid bolt.

2. In a padlock, the combination of a lock case member, a shiitablymounted shackle, and a bolt member in said case member spring-pressed tolocking position and engageable with said shackle to lock said shackle,one of said members havin a shoulder, and a spring carried by the othermember and having a shoulder engageable with said first-named shoulderto resist jarring of said bolt from looking position, said spring urgingsaid shoulders into operative position, and said shackle when movedinwardly from normal locking position permitting release of saidshoulders and retraction of said bolt.

3. In a padlock, the combination of a lock case having a cavity with aninner wall presenting a rib, a shiitably mounted shackle, and alongitudinally and laterally movable spring-pressed bolt in said caseengageable with said shackle to lock said shackle and bearing againstsaid wall to resist outward movement of said shackle, said bolt having ashoulder rigid therewith and releasably engageabie with said rib toresist jarring of said bolt from looking position.

In a padlock, the combination of a lock case, a shiftably mountedshackle, and a spring-pressed bolt in said case engageable with saidshackle to lock said shackle, said case having guide surfaces for saidbolt permitting movement of said bolt in direction transverse andparallel to the shackle movement, said case and bolt having a blockingconnection resisting jarring of said bolt from looking position whensaid shackle is under outward urge, said shackle when moved inwardlypermitting release of said blocking connection and retraction of saidbolt.

5. In a padlock, the combination of a shoul dered lock case, a shiftablymounted shackle, a shouldered spring-pressed bolt in said case to locksaid shackle, and a blocking member interposed between said case andbolt and releasably engageable with the shouldered portions thereof toresist jarring of said bolt from looking position, said shackle whenmoved inwardly from normal locking position permitting release of saidblocking member and retraction of said. bolt.

6. In a padlock, the combination of a lock case, a shiitably mountedshackle, a longitudinally and laterally movable spring-pressed bolt insaid case to lock said shackle, blocking means at the side of said bolttoward the outer portion of said shackle to resist jarring of said boltfrom locking position, and lock mechanism at the other side of said boltfor laterally moving said bolt to release said blocking means and forthereafter retracting said bolt, said blocking means being distinct fromsaid lock mechanism.

7. In a padlock, the combination of a lock case, a shiitably mountedshackle, a spring-pressed bolt in said case to lock said shackle andhaving a shoulder, and a spring carried by said case and having ablocking shoulder engageable with said bolt shoulder to resist jarringof said bolt from locking position, said shackle when moved inwardlyfrom normal locking position permitting release of said bolt shoulderfrom said spring shoulder.

8. In a padlock, the combination of a lock case, a shiftably mountedshackle, a spring-pressed bolt slidably and pivotally mounted in saidcase and lockingly engageable with said shackle, blocking means at oneside of said bolt to resist jarring of said bolt from looking position,and lock mechanism at the other side of said bolt for tilting said boltto unblock the same and for thereafter sliding said bolt to release saidshackle, said blocking means being distinct from said lock mechanism.

9. In a padlock, the combination of a lock case comprising a pluralityof plates secured together in laminated relation, a shiftably mountedshackle, and a spring-pressed bolt in said case to lock said shackle,one of said plates having a shoulder, and said bolt having a shoulderreleasably engageable with said plate shoulder to resist jarring of saidbolt from looking position.

10. In a padlock, the combination of alock case having a cavity and aplate forming a wall of said cavity, a shiftably mounted shackle, and alongitudinally and laterally movable spring-pressed bolt in said cavityto lock said shackle and bearing against said plate to resist outwardmovement of said shackle, said plate and bolt having shoulders rigidtherewith releasably engageable with each other to resist jarring ofsaid bolt from locking position.

11. In a padlock, the combination of a lock case having a cavity with aninner wall presenting a shoulder, a shiftably mounted shacklecooperating with said case, said shouldered wall being at the side ofsaid cavity toward the outer portion of said shackle, and alongitudinally and laterally movable spring-pressed bolt in said caseengageable with said shackle to lock said shackle and bearing againstsaid inner wall to resist outward movement of said shackle, said bolthaving a shoulder releasably engageable with said case shoulder toresist jarring of said bolt from blocking position, and the inwardmovement of said shackle from normal locking position permitting releaseand retraction of said bolt;

CHARLES E. HABRAM. DANIEL J. FOO'I'E.

